should use local unicorn now

.github/workflows/test_mipsevm.yml

@@ -15,10 +15,7 @@ jobs:
         sudo apt-get -y --no-install-recommends install golang-1.16 nodejs npm
     - name: Install unicorn
       run: |
-        git clone https://github.com/geohot/unicorn.git
-        cd unicorn
-        UNICORN_ARCHS=mips make -j8
-        sudo UNICORN_ARCHS=mips make install
+        ./build_unicorn.sh
     - name: Install yarn
       run: |
         npm install --global yarn

.gitignore

@@ -2,3 +2,4 @@ node_modules
 artifacts
 cache
 unicorn
+.*.swp

mipsevm/go.mod

@@ -3,6 +3,7 @@ module mipsevm
 go 1.17
 
 replace github.com/ethereum/go-ethereum => ../minigeth
+replace github.com/unicorn-engine/unicorn => ../unicorn
 
 require (
 	github.com/btcsuite/btcd v0.22.0-beta // indirect